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sashaice [31]
3 years ago
8

Why is it helpful to estimate the answer before adding or subtracting decimals?

Mathematics
1 answer:
slava [35]3 years ago
7 0
<span>Being able to estimate your answer is a very useful skill. ... When decimals are involved, it's very easy to put the decimal point in the wrong place, and ... round all numbers to the same place value—this makes adding or subtracting a bit easier.</span>
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Expand the expression and combine like terms.(2+2w)⋅4+9(w+3)
Nonamiya [84]
0.8+0.8w+9w+27
9.8w+27.8

3 0
3 years ago
19. Given that angle BFC = 58°. Angle BXG = 48° and angle CBF 22 Find () 2BGX (iv) BCG (i) 2BGF (iv) ZBFG (ii) BCF H EE 58 48° D
RoseWind [281]

The unknown angles in the cyclic quadrilateral is as follows:

∠BGX = 74° (sum of angles in a triangle)

∠BGF = 180° (opposite angles of cyclic quadrilateral are supplementary)

∠BCF = 100°(sum of angles in a triangle)

∠BCG  = 26°

∠BFG = 22°

<h3>Cyclic Quadrilateral</h3>

A cyclic quadrilateral has all its angles equal to 360 degrees. The sum of angles in a cyclic quadrilateral is equals to 360 degrees.

Let's find the missing angles as follows:

∠BGX = 180 - 48 - 58 = 74° (sum of angles in a triangle)

∠BGF = 180 - 100 = 80° (opposite angles of cyclic quadrilateral are supplementary)

∠BCF = 180 - 22 - 58 = 100°(sum of angles in a triangle)

∠BCG = 100 - 74 = 26°

∠BFG ≅ CBF = 22°(alternate angles)

learn more on angles here: brainly.com/question/19430381

6 0
2 years ago
Evaluate 48×15^2-5^2×2×24 by using factorisation and algebraic identities.
nikklg [1K]

Step-by-step explanation:

9600

This is your answer

4 0
2 years ago
What is the distance between between 120 and -50 on the number line
Otrada [13]
170

Because you have to add
120 + 50 = 170
4 0
3 years ago
I cant understand this.
djverab [1.8K]
Multiply the top one by 3 for x, so you can eliminate x and find y

then plug in the y into one of the equations to find x
7 0
3 years ago
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